2 * linux/net/sunrpc/gss_spkm3_mech.c
4 * Copyright (c) 2003 The Regents of the University of Michigan.
7 * Andy Adamson <andros@umich.edu>
8 * J. Bruce Fields <bfields@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <linux/err.h>
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <linux/sunrpc/auth.h>
44 #include <linux/sunrpc/svcauth_gss.h>
45 #include <linux/sunrpc/gss_spkm3.h>
46 #include <linux/sunrpc/xdr.h>
47 #include <linux/crypto.h>
50 # define RPCDBG_FACILITY RPCDBG_AUTH
54 simple_get_bytes(const void *p
, const void *end
, void *res
, int len
)
56 const void *q
= (const void *)((const char *)p
+ len
);
57 if (unlikely(q
> end
|| q
< p
))
58 return ERR_PTR(-EFAULT
);
64 simple_get_netobj(const void *p
, const void *end
, struct xdr_netobj
*res
)
68 p
= simple_get_bytes(p
, end
, &len
, sizeof(len
));
76 q
= (const void *)((const char *)p
+ len
);
77 if (unlikely(q
> end
|| q
< p
))
78 return ERR_PTR(-EFAULT
);
79 res
->data
= kmemdup(p
, len
, GFP_NOFS
);
80 if (unlikely(res
->data
== NULL
))
81 return ERR_PTR(-ENOMEM
);
86 gss_import_sec_context_spkm3(const void *p
, size_t len
,
87 struct gss_ctx
*ctx_id
,
90 const void *end
= (const void *)((const char *)p
+ len
);
91 struct spkm3_ctx
*ctx
;
94 if (!(ctx
= kzalloc(sizeof(*ctx
), gfp_mask
)))
97 p
= simple_get_bytes(p
, end
, &version
, sizeof(version
));
99 goto out_err_free_ctx
;
101 dprintk("RPC: unknown spkm3 token format: "
102 "obsolete nfs-utils?\n");
103 p
= ERR_PTR(-EINVAL
);
104 goto out_err_free_ctx
;
107 p
= simple_get_netobj(p
, end
, &ctx
->ctx_id
);
109 goto out_err_free_ctx
;
111 p
= simple_get_bytes(p
, end
, &ctx
->endtime
, sizeof(ctx
->endtime
));
113 goto out_err_free_ctx_id
;
115 p
= simple_get_netobj(p
, end
, &ctx
->mech_used
);
117 goto out_err_free_ctx_id
;
119 p
= simple_get_bytes(p
, end
, &ctx
->ret_flags
, sizeof(ctx
->ret_flags
));
121 goto out_err_free_mech
;
123 p
= simple_get_netobj(p
, end
, &ctx
->conf_alg
);
125 goto out_err_free_mech
;
127 p
= simple_get_netobj(p
, end
, &ctx
->derived_conf_key
);
129 goto out_err_free_conf_alg
;
131 p
= simple_get_netobj(p
, end
, &ctx
->intg_alg
);
133 goto out_err_free_conf_key
;
135 p
= simple_get_netobj(p
, end
, &ctx
->derived_integ_key
);
137 goto out_err_free_intg_alg
;
140 p
= ERR_PTR(-EFAULT
);
141 goto out_err_free_intg_key
;
144 ctx_id
->internal_ctx_id
= ctx
;
146 dprintk("RPC: Successfully imported new spkm context.\n");
149 out_err_free_intg_key
:
150 kfree(ctx
->derived_integ_key
.data
);
151 out_err_free_intg_alg
:
152 kfree(ctx
->intg_alg
.data
);
153 out_err_free_conf_key
:
154 kfree(ctx
->derived_conf_key
.data
);
155 out_err_free_conf_alg
:
156 kfree(ctx
->conf_alg
.data
);
158 kfree(ctx
->mech_used
.data
);
160 kfree(ctx
->ctx_id
.data
);
168 gss_delete_sec_context_spkm3(void *internal_ctx
)
170 struct spkm3_ctx
*sctx
= internal_ctx
;
172 kfree(sctx
->derived_integ_key
.data
);
173 kfree(sctx
->intg_alg
.data
);
174 kfree(sctx
->derived_conf_key
.data
);
175 kfree(sctx
->conf_alg
.data
);
176 kfree(sctx
->mech_used
.data
);
177 kfree(sctx
->ctx_id
.data
);
182 gss_verify_mic_spkm3(struct gss_ctx
*ctx
,
183 struct xdr_buf
*signbuf
,
184 struct xdr_netobj
*checksum
)
187 struct spkm3_ctx
*sctx
= ctx
->internal_ctx_id
;
189 maj_stat
= spkm3_read_token(sctx
, checksum
, signbuf
, SPKM_MIC_TOK
);
191 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat
);
196 gss_get_mic_spkm3(struct gss_ctx
*ctx
,
197 struct xdr_buf
*message_buffer
,
198 struct xdr_netobj
*message_token
)
201 struct spkm3_ctx
*sctx
= ctx
->internal_ctx_id
;
203 err
= spkm3_make_token(sctx
, message_buffer
,
204 message_token
, SPKM_MIC_TOK
);
205 dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err
);
209 static const struct gss_api_ops gss_spkm3_ops
= {
210 .gss_import_sec_context
= gss_import_sec_context_spkm3
,
211 .gss_get_mic
= gss_get_mic_spkm3
,
212 .gss_verify_mic
= gss_verify_mic_spkm3
,
213 .gss_delete_sec_context
= gss_delete_sec_context_spkm3
,
216 static struct pf_desc gss_spkm3_pfs
[] = {
217 {RPC_AUTH_GSS_SPKM
, RPC_GSS_SVC_NONE
, "spkm3"},
218 {RPC_AUTH_GSS_SPKMI
, RPC_GSS_SVC_INTEGRITY
, "spkm3i"},
221 static struct gss_api_mech gss_spkm3_mech
= {
223 .gm_owner
= THIS_MODULE
,
224 .gm_oid
= {7, "\053\006\001\005\005\001\003"},
225 .gm_ops
= &gss_spkm3_ops
,
226 .gm_pf_num
= ARRAY_SIZE(gss_spkm3_pfs
),
227 .gm_pfs
= gss_spkm3_pfs
,
230 static int __init
init_spkm3_module(void)
234 status
= gss_mech_register(&gss_spkm3_mech
);
236 printk("Failed to register spkm3 gss mechanism!\n");
240 static void __exit
cleanup_spkm3_module(void)
242 gss_mech_unregister(&gss_spkm3_mech
);
245 MODULE_LICENSE("GPL");
246 module_init(init_spkm3_module
);
247 module_exit(cleanup_spkm3_module
);